...can't be treated seriously...
It ignores (at least) these (some already mentioned):
Stormbringer, Mournblade, and its/their various other incarnations from Moorcock's "Eternal Hero" series.
The swords from Saberhagen's "The Book of Swords" series.
Grayswandir, of course. And its counterpart in Tir-na N'goth.
Blackwand, Pathfinder, Nightslayer, Lady Teldra/Godslayer/Remover-of-aspects-of-deity, Iceflame (although it appears as a dagger on Sethra's belt, given that Lady Teldra changes form why can't Iceflame?) from Brust's "Dragaera" series.
Oh, and Captain Carrot's sword from Pratchett's "Discworld", probably the most *unmagical* sword in all the universes, but very, very sharp.
And no doubt many others I shall recall after I click on submit.